[Merge] ~dbungert/livecd-rootfs:desktop-no-cloud-init-network into livecd-rootfs:ubuntu/master

[Dan Bungert]

Thanks Brett.

PR opened at https://github.com/canonical/subiquity/pull/2197 for patch from https://code.launchpad.net/~dbungert/livecd-rootfs/+git/livecd-rootfs/+merge/484436/comments/1314968 - but to be clear, this PR adjusts the target installed system and first boot, not the installation boot.
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https://code.launchpad.net/~dbungert/livecd-rootfs/+git/livecd-rootfs/+merge/484436
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